Doorbell



FIG. 1 is a perspective view of an embodiment of a doorbell inaccordance with the present invention.

FIG. 2 is a front view thereof.

FIG. 3 is a back view thereof.

FIG. 4 is a left side view thereof.

FIG. 5 is a right side view thereof.

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines show portions of the doorbell and form no part of theclaimed design.

CLAIM The ornamental design for a doorbell, as shown and described.